New Features
Input: Added support for 20 more peripherals (including controllers, barcode readers, keyboards, mice, external storage devices, etc.)
Video: Added a 60.0 FPS mode to reduce dropped frames
Video: Added support for exclusive fullscreen mode (Windows only)
Video: Added option to rotate the display (for homebrew games)
Performance: Minor performance enhancements on Windows (~5%) and large gains on Linux by enabling LTO (25-30%)
Movies: Rewrote movie file format from scratch to be a lot more flexible, and editable by hand. (Old .mmo files are no longer supported)
Debugger: Several enhancements and a number of additions/changes to the Lua API.
Accuracy: Improved FDS IRQ emulation

Bug Fixes
General: Several miscellaneous bugs have been fixed.
Debugger: A large number of small bugs and usability issues have been fixed.
HD Packs: Fixed performance issues with HD Packs in CHR RAM games (over 2x faster)